The main anime games have a:

• main game package (one big zip)
• language packages (also big zips)
• hdiff packages for the main game and language packages (hdiff zips)
• live updates (aka hot patches, downloading in the game)

If you wish bring back Nilou banner (in version 3.1 banners phase 2) - you can download live-hotfix .blk and put it to the game folder and get happiness

1. Install nodejs (search how to install on Windows, Linux, MacOS, etc)
2. Change mainUrl in loader.js to a workable url (but you can keep "as is")
3. Change versions and suffixes in versions.release.js (if you really want to use some different versions) in the loader.js
4. Run terminal in the project folder (mouse right-click and run terminal)
5. Run npm install
6. Run node loader.js if you want to download files from the live updates by version numbers and prefixes using versions.release.js
7. Run node links-loader.js if you want to download files from the simple links in multiple .txt files inside links folder (you should create this folder and put multiple .txt files with direct http/https links to game files)
8. Run node server.js to start local http server to emulate update server using downloaded data. You can connect your game to this update server using modded query region (it seems you can use it for android apk to download android/data/*** in old versions if you have live data)
9. Data will gradually be loaded into the downloads folder in the same directory
10. Do whatever you want with data

When downloading files are written directly to the disk to .~tmp files (without RAM) to downloads (not system downloads, only nearby script). Then the temporary extension is removed after full download. You can turn off the Internet or press the Ctrl + C to stop and later continue automatically downloading .~tmp files from the last bytes. Don't delete .~tmp files if you want to resume! Just start loader.js or links-loader.js again!